Tank



Nov. 15, 1927. 1649.729

F. A. PFFER TANK Filed Aug. 31, 1925 VEA/T052. y FA PPE/FER.

lll

Patented Nov. 15, 1927.

I inirED STATES PATENT OFFICE.

FERDINAND A. PFEIFER, OF SERINGFELD, OHIO, ASSGNGR T0 THE THOMAS @t .AEM-

STRONG COMPANY, OF LONDON, OHIO, A CORPORATON OF OIIO.`

TANK.

Application led August 31, 1925. Serial No. 53,529.

between the side walls and bottom yplate ot such a tank.

One object ot the invention is toprovide such a joint which will be absolutely leak proot `and which will have sufficient inechanical strength to eiiectively prevent the separation of the connected parts.

A further object ot the invention is to provide such a tank which will be simplein itsv construction and can be produced at a low cost. l j

Other objects of the invention will appear as the device is described in detail.

ln the accompanying drawings Fig. l is a perspective view ot a tank embodying my invention; Fig. 2 is a side elevation, partly broken away, of a port-ion of the joint; Fig. 3 is a tansverse section taken through the joint on the line 33 of 2; Fig. l is a. transverse section taken through the joint on the line 1 -l oit Fig. 2; and Fig. 5 is a sectional detail view of portions of the dies :tor forming the joint.

ln these drawings I have illustrated one embodiment ot my invention and have shown the same as applied between the side walls and bottom plate of a stock tank but it will i be understood that this particular embodiment has been chosen tor the purposes ot illustration only, and that not only may the joint take various forms but that it may be applied to tanks or similar structures ot various kinds and between various walls thereof, the terms side wall and bottom plate being used herein as words of description and not as words ot limitation.

The stock tank here illustrated is oblong in form and comprises a vertical wall l, which may be characterized as the side wall oil the tank, and bottom plate 2 connected at its edges with the lower portions ot the side wall. The side wall is provided along its lower edge with a channel which opens inwardly, that is, toward the interior ot the tank, and the edge portions ot the bottoni plate extend into this channel. The channel niay be formed in any suitable manner but `preferably the lowerportion of the side wall is tirst bent outwardly, at substantially right angles to the wall, as shown at 3, to form the top wall of the channel and the outer part of this outwardly bent portion then bent downwardly and'inwardly, as shown at 4,

to torni the bot-tom wall of the channel. The two walls ot the channel are substantially parallel but are spaced some distance one` troni the other. It' desired, the inner edge of the bottom wall l may be bent upon itself, as shown at 5, to reinforce the channel and to avoid a raw edgeon the bottom wall of the channel. A packing 6 or any suitable character is interposed between the bottom plate and the upper wall ot the channel. Preferably the bottom plate and packing are placed in position after the lowerA portion ot the side wall has been bent outwardly and before the outer part of this portion of the wall has been bent inwardly to form the bottom wall ot the channel, thus enclosing the edge portion of the bottom plate in the channel. The upper and lower walls of the channel are pressed together to compress the packing between the top wall thereof and the bottom plate and to tightly grip the bottom plate and thus form a tight joint. To provide a rigid connection between the bottom plate and the side wall of the tank, the walls ot the channel`l the bottom plate and the packing are provided with alined indentations, as shown at 7 in Figs. 2 and s, the indentations of the one part extending into the indentations in the adjacent part so that the several parts are brought into interlocking relation and the side wall and bottom plate of the tank are held lirmly against relative displacement. The indentations made of any suitable shape or size but I prefer that they shall be circular in form and of small size, and shall be spaced apart along the channel, after the manner of rivets.

Any suitable means may be employed for forming the indentations and for compressing the walls ot the channel and the packing but l prefer to use for this purpose dies which will torni the indentations at one point only and will compress the walls oit' the chan nel for a considerable distance on eaehside ol the indentation, such dies being illustrated in Fig. 5. In the operation of the dies the alined indentations ot the several parts will be formed and the top and bottom walls ot the channel compressed at the same opera tion and in forming a succeeding indentation the dies are so placed that they will slightly overlap that portion of the channel which has been compressed in the forming ot the these parte iirinly compressed together euch l leakage ispractically impossible. The parts c of the jointwhi'ch are pressed into interlockL ing enggigenient serve to positively prevent any separation of the bottoni plate and the` eide Wall end to hold these parte rigidly 1n their proper ieulationuoneto the other.` Not onlyis `this jointvery strong and positively leali `proof but it eenalso he produced at e( costl niuchlower th the cost of the riveted jointrfand, nfmnch less tinieg o y k hileIhave shown and described" one einhodimentofiny invention I Wish it to be understood that I donot desire to he limited to thedetails thereof as various modifications moy occnrto a person skilled "in the art.`

HavingnoW fully described iny invention what I claim as new :uid desire to secure by Lettere Ptent, is: i

In :istrueture of the clnirnctor described, :l side wall having its lower portion shaped to forni an inwardly opening channel having;r substantially parallel upper and lower walls, a bottoni plete honing* an edge portion extendingl into `seid channel, and peeking' interpoeedhetween saidhottoni plete and the upper Wallet said ehennehthe walls of said channel henigpressed together throughout the length thereof to compress the"`peckinj between the upper will oi said clizinnel, sziid bottoni platte end the mills'of said ehinnel end said bottom plate,` solid packinglmi/ingr" pressed A upn'rdly" :it seperated points along sind` channelto lezrus a projection on'eat'h lower nieniher to extend into n recessin the" udjaicent upper ineiiibei'.

In testimony whereof, I ax my signature hereto.

,FERDINAND A. PFEIF'ER. 

